Malicious PDF — malware analysis report

Static analysis result for SHA-256 20403721e8500d43…

MALICIOUS

PDF

73.1 KB Created: 2021-03-11 14:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8f591d62d3b327e634d54aa27bac395c SHA-1: 1f09fdfaa3b2fac0fa78e70a4fde2c3cf4df8748 SHA-256: 20403721e8500d43efd4ef261b934a6f0d7fc7c9637b1ba70b2a5ff702274fb4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/wix?keyword=corresponding+angles+worksheet+grade+8 PDF link annotation
    • https://jotajawe.weebly.com/uploads/1/3/1/6/131606146/xugevevokogemag_raxesu.pdfIn PDF document text
    • https://cdn.sqhk.co/naxaroja/djhLUNh/city_bird_pigeon_simulator_3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5fecb191d74e0.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/bicKjgv/dufomo.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/tipege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_60485dad4665e.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/f5hdji8/taming_master_novel_wikia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_602e67d623f9a.pdfIn PDF document text
    • https://midumusifefo.weebly.com/uploads/1/3/5/4/135401272/welanipuriko-sapis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366377/normal_60007455af171.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/Igg4lhf/bivitetivekesuvok.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/qLjf2WA/deer_hunter_2018_mod_apk_5._2._1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_60420769bbc2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_601b66a35eb51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473926/normal_60053ebad9e61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379851/normal_5fea02da5de82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476273/normal_6027fc1a34353.pdfIn PDF document text
    • https://cdn.sqhk.co/sojetaji/Fd1jdif/16825006828.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://texokobatogu.epizy.com/sepewuli.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/buncefield_incident_final_report.pdfIn PDF document text
    • http://tuwafuvokix.rf.gd/54092455441.pdfIn PDF document text
    • http://ziputira.epizy.com/black_toddler_boy_twist_hairstyles.pdfIn PDF document text
    • http://bewefesa.epizy.com/how_to_replace_a_verizon_battery.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 5476 bytes
SHA-256: 2e574012fd4fcd2f2de0c50d474fcf6a8e62abe87842df3970b577aba1640c5a
font_01_sfnt_off0000f3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 10192 bytes
SHA-256: 2c33d20c8a1bcb15e5791ea9a401106ac82bdcbb3045f375075db683e8549a75

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